The S&P 500, also known as the Standard & Poor's 500, is a stock market index that measures the performance of 500 large companies listed on stock exchanges in the United States. It is one of the most widely followed equity indices and is often considered a gauge of the overall health of the US stock market.
The S&P 500 index is one of the most widely used benchmarks for the performance of the stock market in the United States. It tracks the performance of 500 large-cap American companies and is seen as a gauge of the overall health of the economy. Over the years, the index has seen several peaks and troughs, reflecting the ebbs and flows of the market.